Its been over a year since Samsung released a new Chromebook, and since then the competition has been heating up: Dell, HP, Lenovo and Toshiba all sell Chrome OS devices now, as does Acer, which has been at it from day one. Accordingly, Samsung is refreshing its lineup: the company just announced the Chromebook 2, which comes in 11- and 13-inch screen sizes, and will ship next month starting at $320 for the smaller version (the bigger one costs $400).